2603609 has 4 divisors (see below), whose sum is σ = 2622480. Its totient is φ = 2584740.

The previous prime is 2603581. The next prime is 2603617. The reversal of 2603609 is 9063062.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2603609 - 2⁸ = 2603353 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (2603639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9227 + ... + 9504.

It is an arithmetic number, because the mean of its divisors is an integer number (655620).

2^2603609 is an apocalyptic number.

It is an amenable number.

2603609 is a deficient number, since it is larger than the sum of its proper divisors (18871).

2603609 is a wasteful number, since it uses less digits than its factorization.

2603609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18870.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 2603609 is about 1613.5702649714. The cubic root of 2603609 is about 137.5704806708.

The spelling of 2603609 in words is "two million, six hundred three thousand, six hundred nine".